Hi Pádraig,
On my 6th run of "make check", the cat-buf test failed.
It's an inherently racy test.
If the dd process is starved until "2" is printed,
it will end up printing both lines to "out".
Here's the code:
# Use a fifo rather than a pipe in the tests below
# so that the producer (cat) will wait until the
# consumer (dd) opens the fifo therefore increasing
# the chance that dd will read the data from each
# write separately.
mkfifo fifo || framework_failure
echo '1' > exp
dd count=1 if=fifo > out &
(echo '1'; sleep .2; echo '2') | cat -v > fifo
wait #for dd to complete
compare out exp || fail=1
Exit $fail
We could allow either one line or both,
but then how can the test fail?
Alternatives: print a warning (a la skip_test_)
and pass the test, or just skip it when we lose the race.
No big deal.
